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<html>
<head>
<script type="text/javascript">
window.alert=newalert;
function Test(){
alert('12');
}
function newalert(msg)
{
if(msg='试用期已满')
{
//什么 也不做
}
else
{
alert(msg);
}
}
</script>
</head>
<body>
<input type="button" onclick="Test();"/>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<input type="button" onclick="Test();"/>
<script type="text/javascript">
Object.prototype.alert = newalert;
//window.alert=newalert;
function Test(){
alert('12');
}
function newalert(msg)
{
if(msg=='试用期已满')
{
//什么 也不做
}
else
{
alert(msg);
}
}
</script>
</body>
</html>
<html>
<head>
<script type="text/javascript">
window.alert=newalert;
function Test(){
alert('12');
}
function newalert(msg)
{
if(msg!='试用期已满')
{
alert(msg);
}
}
</script>
</head>
<body>
<input type="button" onclick="Test();"/>
</body>
</html>
var oldAlert = window.alert;
window.alert = function(msg){
if(msg=='试用期已满'){
return
}else{
oldAlert(msg)
}
}